22516506 has 12 divisors (see below), whose sum is σ = 48785802. Its totient is φ = 7505496.

The previous prime is 22516453. The next prime is 22516523. The reversal of 22516506 is 60561522.

22516506 is a `hidden beast` number, since 2 + 2 + 5 + 1 + 650 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19000881 + 3515625 = 4359^2 + 1875^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22516506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 625441 + ... + 625476.

Almost surely, 2^22516506 is an apocalyptic number.

22516506 is an abundant number, since it is smaller than the sum of its proper divisors (26269296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22516506 is a wasteful number, since it uses less digits than its factorization.

22516506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250925 (or 1250922 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22516506 is about 4745.1560564432. The cubic root of 22516506 is about 282.3798261931.

The spelling of 22516506 in words is "twenty-two million, five hundred sixteen thousand, five hundred six".